Paper-cutting machine



(No Model.) B J. PAVYER & T. BURNS.

PAPER CUTTING MACHINE. v No. 413.086. Patented Oct. 15, 1889.

N. PETERS. Phowmho ra hen WashZngibn. D. C.

UNITED STATES PATENT OFFICE.

BENJAMIN J. PAVYER AND THOMAS BURNS, OF ST. LOUIS, MISSOURI, ASSIGNORS TO THE ST. LOUIS TYPE FOUNDRY, OF MISSOURI.

PAPER-CUTTING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 413,086, dated October 15, 1889. Application filed December 31., 1888- Seriel No. 2951 (N model.)

To all whom it may concern.-

Be it known that we, BENJAMIN J. PAVYER and THOMAS BURNS, both of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Paper-Cutting Machines, of which the following is a full, clear, and exact description, refer= ence being had to the accompanying drawings, forming-part of this specification.

This is an improvement in the clampingbar; and it consists in the manner of construction by which the clamping-face of the bar may be adjusted in width, as and for the purpose hereinafter set forth.

Figure I is a front view of enough of the machine to illustrate our invention. is a top view of the same. Fig. III is atransverse section of the machine at III III, Fig. 11, with part of the guide-frame broken out, and showing the clamping-bar, &c., in rear elevation, with the movable part of the clampingbar in its higher position on the body of the cla1nping-ban Fig. IV is a transverse section of the machine at the rear of the clamping-bar, showing the movable part of the bar in its lower position. Fig. Vis a bottom view of the clamping-bar. Fig. VI is a detail vertical section at VI VI, Fig. III. Fig. VII is a detail vertical section at VII VII, Fig. IV. Fig. VIII is a detail vertical section at VIII VIII, Fig. III. Fig. IX isadetailverticalsection of a modification, the section being taken at line VII VII, Fig. IV.

1 is an ordinary or any suitable frame, having a table 2, on which the paper is laid for cutting.

3 is the Wooden bar let into the table to receive the impact of the knife, as usual.

4. is the arch-frame, whose uprights 5 have the guides for the knife frame or bar 6.

7 is the knife.

No novelty is claimed in the above parts.

The clamping-bar (to which the invention applies) has a body 8, whose end. guide=ribs 9 work in guide-grooves 10 of the uprights 5. The bar 8 has a recess 11, occupied byamovable piece or bar 12, whose lower face 13 is adapted to bear upon the pile 14 of paper which is being cut. vThe piece or bar 12 has at the ends guide-ribs 15, which work in the Fig. 11'

v grooves 10 below the guide ribs 9 of the body of the clamping=bar. The piece 12 has a projecting lip or rib 16, which, when the piece 12 is in its lower position, as seen in Fig. VII, enters a rabbet groove 17 in the side of the main bar or body 8. The purpose of this is to prevent the upward bending of the piece or bar 12 when the pressure is upon the paper 14. The piece 12 has lugs 18 with vertical slots at 19 for the passage of the screw-bolts 20, which screw into the body 8. When the piece 12 is in its lower position and these bolts are screwed up tight, the lip 16 is forced into the groove 17 and the lower faces of the body 8 and piece 12 are flush with each other, so as to form a broad surface for bearing on the paper 14. The piece 12 may be fastened in its upper position, as seen in Figs. III and VI, by the screw-bolts, or it may be held up by other meansfor instance, by spring-catches 21. The spring-catches are attached at the lower ends to the piece 12, and have near the upper ends studs 22, which enter holes 23 in the side of the body or main part 8 of the clamping-bar. (See Figs. III and IV.) The upper ends of the springs are bent outward, so as to give a finger-hold in releasing the studs 22 from the holes 23.

24 is the gage, whichis constructed to enter the recess 11 when the piece 12 is in its upper position, so as to render the machine available for cutting the paper into narrow strips, whose width is determined by the gage. (See Fig. VI.) When, however, the paper is cut of greater width, the piece 12 is fixed in its lower position, as seen in Fig. VII, so as to give a broad bearing on the paper.

In the modification shown in Fig. IX the piece 12 extends beneath the lower edge or face 25 of the body 8, so as to form the whole bearing-face when in the lower position. hen the narrow face 25 alone is used, the piece 12 is of course elevated, so as to be out of the way of the gage, as before described.

26 is the hand-screw by which the clamping-bar is raised or lowered.

27 is the hand-screw by which the gage is moved longitudinally on the table.

We claim as our invention 1. The clamping-bar of apaper cuttenwith the piece 12 movable vertically in a recess 11 of the bar, substantially as and for the purpose set forth.

2. The combination, in a cla1nping-bar for paper-cutters, of the main part 8, having a rebolts 20, substantially as and for the purpose 15 set forth.

4. The combination, in the clamping-bar of a paper-cutter, of the main part 8, with recess 11. and rabbet-groove 17, the piece 12, having a rib 16, slotted lugs 18, and spring- 20 catches 21, and the bolts 20, all substantially as and for the purposes set forth.

BENJAMIN J. PAVYER. THOMAS BURNS.

Witnesses:

SAML. KNIGHT, VBENJN. A, KNIGHT. 

